EUSPOKGIA. 125 



Genus EUSPONGIA. 



Massive Spongidse with distinct main and branched, continnally 

 anastomosing connecting-fibres. The meshes of the connecting- 

 fibre-net are mostly under 0*04 milhm. wide. The surface is conu- 

 lated and destitute of a dense cortex. Vestibular spaces absent 

 or small. 



Euspongia officinalis, auct. 



Euspongia officinalis., E. Graeffe, " Uebersicht der Seethierfauna des Golfes 



von Triest, nebst Notizen iiber Vorkommeu, Lebensweise, Erscheinungs- 



und Eortpflanzungszeit der einzelnen Arteu," Arbeiten aus dem zoolo- 



gischen Institute der Univei'sitiit Wien und der zoologischen Station in 



Triest, Band iv. Heft 2, Seite 3 (1882). 

 Euspongia officinalis, E. v. Lendenfeld, " A Monograph of the Australian 



Sponges. — Part VI. The Genus Euspongia," Proceedings of the Linuean 



Society of New South Wales, vol. x. p. 528 (1885). 

 Euspongia officinalis, N". de PolejaeiJ, " Eeport on the Keratosa," Eeport on the 



Scientific Eesults of the Voyage of H.M.S. ' Challenger' during the years 



1873-76 : Zoology, vol. xi. part xxxi. p. 53 (1885). 

 Euspongia officinalis, S. O. Eidley, "Spongiida": Eeport on the Zoological 



Collections made in the ludo-Pacific Ocean during the Voyage of H.M.S. 



'Alert; 1881-82, p. 379 (1884). 

 Euspongia officinalis, E. E. Schulze, " Untersuchungen iiber den Bau und die 



Entwicklung der Spongien. VII. Mittheilung : Die Familie der Spon- 



gidse," Zeitschrift fiir wissenschaftliche Zoologie, Band xxxii. Heft 4, 



Seite 616 (1879). 

 Spongia officinalis, J. S. Bowerbank, A Monograph of the British Spongiada?, 



vol. i. p. 205, Eay Society (1864). 

 Spongia officinalis, H. J. Carter, " Some Sponges from the West Indies and 



Acapulco in the Liverpool Pree Museum, described with general and 



classificatory remarks," Annals and Magazine of Natural History, ser. 5, 



vol. Lx. no. 52, p. 270 (1882). 

 Spongia officinalis, E. Ehlers, Die Esper'schen Spongien in der zoologischen 



Sammlung der k. Universitiit Erlangen, p. 12 (1870), 

 Spongia officinalis, E. J. C. Esper, Die Pflanzenthiere, Theil ii. p. 218 (1794). 

 Spongia officinalis, A. Hyatt, " Eevision of the North- American Porifera^, with 



remarks upon foreign species. — Part II.," Memoirs of the Boston Society 



of Natural History, vol. ii. p. 511 (1877). 



